UXLink Social Mission 1 @UXLINKofficial Orbiter Finance (@Orbiter_Finance, OBT): Technical Deep Dive Orbiter Finance is a cross-rollup bridge protocol based on a hybrid architecture that combines the Optimistic method with ZK-SPV (Zero-Knowledge Simplified Payment Verification). It currently processes over $16 billion in cumulative transaction volume across more than 70 networks, with an average transfer speed of about 10 to 20 seconds. The Maker system guarantees asset withdrawals through an over-collateralization structure ranging from 5x to a maximum of 200x, while ZK-SPV performs verification and arbitration using cryptographic proofs. The protocol is evolving into a meta layer called Orbiter Rollup (Vizing zkEVM), with key monitoring metrics including transfer latency, Maker participation rate, and arbitration occurrence frequency. Orbiter's transfer structure adopts a decentralized optimistic bridge model where assets move directly from the sender to the Maker. The sender transfers assets to the Maker's personal address (EOA), including an identification code that encodes the destination network in the decimal four places of the transfer amount. The Maker automatically detects this and pays the same amount to the recipient from the pre-deposited liquidity pool of the destination chain. This method reduces gas costs while maintaining compatibility with non-EVM chains like Starknet or Validium, as it does not go through smart contracts on the source chain. The security structure is based on the security of Ethereum L1, verifying the existence and validity of transactions without separate cross-chain trust assumptions. ZK-SPV cryptographically proves the existence of transactions that occurred on the sending chain, and optimistic execution is based on the honest behavior of the Maker, resolving disputes through arbitration procedures. It supports various forms of rollups, including optimistic rollups, ZK rollups, and Validium, and since all data is posted on Ethereum L1, security remains consistent. The Maker plays a role in providing liquidity and earning transfer fees. Generally, a capital of 110 to 180 ETH is required, and transaction limits and fees can be set per network pair. Fees range from 0.03% to 0.3%, and there is no risk of capital loss. The Maker must maintain an over-collateralization structure, requiring about 5 to 10 times for EVM rollups and up to 200 times for non-EVM chains. If transfers are delayed, the sender can initiate arbitration procedures, and in case of proof failure, the Maker's collateral is forfeited. This structure encourages honest behavior through economic incentives. The evolution into Orbiter Rollup is a process of advancing from a simple bridge to a ZK-based meta layer. Vizing zkEVM adopts a zkEVM-compatible structure and implements over 20% faster proof generation through GPU-accelerated provers. It aims to build an ecosystem centered around smart wallets instead of personal wallets through ERC-4337-based account abstraction, targeting a transaction processing speed of 3,000 to 4,000 transactions per second and a finality of 10 to 20 seconds. Ultimately, it aims to serve as an integrated liquidity layer connecting all chains. Data consistency and finality are secured by utilizing Ethereum L1 as a common data layer. Since the states of all supported rollups are recorded on L1, verification is possible without separate light clients, maintaining a finality processing structure that considers differences between rollups. For optimistic rollups, it combines fraud proofs and ZK verification to achieve fast finality, while ZK rollups provide immediate finality, and Validium mixes off-chain data with on-chain proofs for verification. Potential risk factors include liquidity imbalance, decreased Maker participation, delays due to network congestion, and rising gas fees on the destination chain. Technical risks include vulnerabilities in the ZK-SPV circuit, Maker centralization, and potential delays in arbitration procedures. However, no major security incidents have been reported to date, maintaining a success rate of over 99%. Key metrics to watch over the next 6 to 12 months include average transfer latency (10 to 20 seconds), the number of Maker participation nodes (targeting over 500), liquidity size, arbitration occurrence rate (below 0.5%), and transaction success rate (above 99.5%). Daily transaction volume is around $5 million, and annual fee revenue exceeds $50 million. It supports over 70 networks, with liquidity and transaction volume ratios exceeding industry averages. Orbiter Finance possesses an advanced architecture that implements cross-rollup interoperability by combining optimistic execution with ZK verification. The stable Maker incentive design through an over-collateralization structure, the trustless transfer structure based on Ethereum L1 security, and the expansion of the Omi chain through Vizing zkEVM are likely to create additional value alongside the expansion of the L2 ecosystem in the future. However, the level of decentralization of the Maker and the sustainability of liquidity remain key monitoring factors.